Commit Graph

9158 Commits

Author SHA1 Message Date
Ron Eldor
78c3040347 Rephrase x509_crt extension member description
Rephrase doxygen comments for subject alternative name
and certificate policies.
2019-05-13 15:49:53 +03:00
Ron Eldor
26cfd1361d Rephrase changeLog entries
Rephrase the changeLog entries for clarity and capitalize RFC.
2019-05-13 15:48:38 +03:00
Janos Follath
293c3dae6d Remove redundant memset()
The preceding calloc() already zeroizes that memory area, therfore the
memset() is not necessary. Compilers are likely to optimize this out,
but it still can be confusing to readers.
2019-05-10 15:53:03 +01:00
Janos Follath
6c379b4b80 Propogate error when parsing SubjectAltNames
The previous behaviour of mbedtls_x509_parse_subject_alternative_name()
was to silently ignore errors coming from x509_get_other_name(). The
current commit fixes it and returns with an error.
2019-05-10 14:17:16 +01:00
Janos Follath
2f0ec1e3bf Tidy up style in x509_info_subject_alt_name 2019-05-10 11:06:31 +01:00
Janos Follath
22f605fbab Print unparseable SubjectAlternativeNames
In x509_info_subject_alt_name() we silently dropped names that we
couldn't parse because they are not supported or are malformed. (Being
malformed might mean damaged file, but can be a sign of incompatibility
between applications.)

This commit adds code notifying the user that there is something, but
we can't parse it.
2019-05-10 10:57:44 +01:00
Janos Follath
ab23cd1eae Remove unneeded checks from x509_get_other_name
Lengths are aleady checked in mbedtls_asn1_get_len() which is called in
mbedtls_asn1_get_tag(), therefore it is not necessary to check
the lengths explicitly afterwards.

Also with the previous flow data was left in the output buffer on some
errors.
2019-05-09 15:05:30 +01:00
Janos Follath
11b41eb12b Fix typos in x509_crt.h 2019-05-08 15:30:33 +01:00
Janos Follath
5091bec3ea Fix doxygen for new x509 structures
The documentation for some new structures and members was only a C style
comment and wasn't picked up by doxygen. This commit adds the missing
asterisks.
2019-05-08 15:23:08 +01:00
Ron Eldor
3c4734a2a5 Add Wisun Fan device certificate
Add certificate with Wisun fan device extended key usage,
support parsing it and add tests.
2019-05-07 17:06:47 +03:00
Ron Eldor
226991e624 Add ChangeLog entry for new extensions change
Add an entry for the new x509 extension parsing support.
2019-05-07 17:05:45 +03:00
Ron Eldor
74d9acc144 Add support for certificate policies extension
Add support for certificate policies, as defined in rfc 5280.
Currently support only `anyPolicy` policy.
2019-05-07 17:05:45 +03:00
Ron Eldor
b2dc3fa72e Suppport otherName of type hardware module name
Add support of parsing of subject alternative name, of type otherName.
Currently supports only hardware module name, as defined in rfc 4108.
2019-05-07 17:04:57 +03:00
Jaeden Amero
75d9a333ce Merge remote-tracking branch 'origin/pr/1633' into development
* origin/pr/1633: (26 commits)
  Fix uninitialized variable access in debug output of record enc/dec
  Adapt PSA code to ssl_transform changes
  Ensure non-NULL key buffer when building SSL test transforms
  Catch errors while building SSL test transforms
  Use mbedtls_{calloc|free}() in SSL unit test suite
  Improve documentation of mbedtls_record
  Adapt record length value after encryption
  Alternative between send/recv transform in SSL record test suite
  Fix memory leak on failure in test_suite_ssl
  Rename ssl_decrypt_buf() to mbedtls_ssl_decrypt_buf() in comment
  Add record encryption/decryption tests for ARIA to SSL test suite
  Improve documentation of mbedtls_ssl_transform
  Double check that record expansion is as expected during decryption
  Move debugging output after record decryption
  Add encryption/decryption tests for small records
  Add tests for record encryption/decryption
  Reduce size of `ssl_transform` if no MAC ciphersuite is enabled
  Remove code from `ssl_derive_keys` if relevant modes are not enabled
  Provide standalone version of `ssl_decrypt_buf`
  Provide standalone version of `ssl_encrypt_buf`
  ...
2019-05-02 09:08:43 +01:00
Jaeden Amero
0804b1d609 Merge remote-tracking branch 'origin/pr/2617' into development
* origin/pr/2617:
  Regenerate errors.c
  crypto: Update to Mbed Crypto 461fd58fb2
2019-05-01 09:58:07 +01:00
Jaeden Amero
e3435053f5 Merge remote-tracking branch 'origin/pr/2473' into development
* origin/pr/2473:
  Fix CMake build error on Cygwin and minGW platforms
2019-05-01 09:56:42 +01:00
Jaeden Amero
4e952f6ebd Regenerate errors.c
Autogenerate errors.c There are changes in error.c due to updating the
crypto submodule to a version that no longer has the SSL, X.509, or net
modules. The errors are correctly sourced from Mbed TLS and not Mbed
Crypto, but they do move around within the file due to how the error
generator script is written.
2019-04-30 16:47:36 +01:00
Jaeden Amero
af35383b89 crypto: Update to Mbed Crypto 461fd58fb2
Update the Mbed Crypto submodule to revision 461fd58fb2 ("Merge pull
request #71 from Patater/remove-non-crypto"). This includes removing
SSL, NET, and X.509 modules from Mbed Crypto.
2019-04-30 16:46:37 +01:00
Hanno Becker
1f10d7643f Fix uninitialized variable access in debug output of record enc/dec 2019-04-26 13:34:37 +01:00
Hanno Becker
22bf145599 Adapt PSA code to ssl_transform changes 2019-04-25 12:58:21 +01:00
Hanno Becker
78d1f70ab6 Ensure non-NULL key buffer when building SSL test transforms 2019-04-25 12:58:21 +01:00
Hanno Becker
a5780f1993 Catch errors while building SSL test transforms 2019-04-25 12:58:21 +01:00
Hanno Becker
3ee5421f9c Use mbedtls_{calloc|free}() in SSL unit test suite 2019-04-25 12:58:21 +01:00
Hanno Becker
cd430bc099 Improve documentation of mbedtls_record 2019-04-25 12:58:21 +01:00
Hanno Becker
78f839df94 Adapt record length value after encryption 2019-04-25 12:58:21 +01:00
Hanno Becker
907ab20b38 Alternative between send/recv transform in SSL record test suite 2019-04-25 12:58:21 +01:00
Hanno Becker
81e16a34f5 Fix memory leak on failure in test_suite_ssl 2019-04-25 12:58:21 +01:00
Hanno Becker
b2ca87d289 Rename ssl_decrypt_buf() to mbedtls_ssl_decrypt_buf() in comment 2019-04-25 12:58:21 +01:00
Hanno Becker
d0fa2d7563 Add record encryption/decryption tests for ARIA to SSL test suite 2019-04-25 12:58:21 +01:00
Hanno Becker
0db7e0ce68 Improve documentation of mbedtls_ssl_transform 2019-04-25 12:58:21 +01:00
Hanno Becker
29800d2fd1 Double check that record expansion is as expected during decryption 2019-04-25 12:58:21 +01:00
Hanno Becker
1c0c37feed Move debugging output after record decryption
The debugging call printing the decrypted record payload happened
before updating ssl->in_msglen.
2019-04-25 12:58:21 +01:00
Hanno Becker
b3268dac00 Add encryption/decryption tests for small records
This commit adds tests to check the behavior of the record encryption
routine `ssl_encrypt_buf` when the buffer surrounding the plaintext is
too small to hold the expansion in the beginning and end (due to IV's,
padding, and MAC).

Each test starts successively increases the space available at the
beginning, end, or both, of the record buffer, and checks that the
record encryption either fails with a BUFFER_TOO_SMALL error, or
that it succeeds. Moreover, if it succeeds, it is checked that
decryption succeeds, too, and results in the original record.
2019-04-25 12:58:21 +01:00
Hanno Becker
a18d1320da Add tests for record encryption/decryption
This commit adds tests exercising mutually inverse pairs of
record encryption and decryption transformations for the various
transformation types allowed in TLS: Stream, CBC, and AEAD.
2019-04-25 12:58:21 +01:00
Hanno Becker
d56ed2491b Reduce size of ssl_transform if no MAC ciphersuite is enabled
The hash contexts `ssl_transform->md_ctx_{enc/dec}` are not used if
only AEAD ciphersuites are enabled. This commit removes them from the
`ssl_transform` struct in this case, saving a few bytes.
2019-04-25 12:58:21 +01:00
Hanno Becker
8031d06cb2 Remove code from ssl_derive_keys if relevant modes are not enabled
This commit guards code specific to AEAD, CBC and stream cipher modes
in `ssl_derive_keys` by the respective configuration flags, analogous
to the guards that are already in place in the record decryption and
encryption functions `ssl_decrypt_buf` resp. `ssl_decrypt_buf`.
2019-04-25 12:58:21 +01:00
Hanno Becker
2e24c3b672 Provide standalone version of ssl_decrypt_buf
Analogous to the previous commit, but concerning the record decryption
routine `ssl_decrypt_buf`.

An important change regards the checking of CBC padding:
Prior to this commit, the CBC padding check always read 256 bytes at
the end of the internal record buffer, almost always going past the
boundaries of the record under consideration. In order to stay within
the bounds of the given record, this commit changes this behavior by
always reading the last min(256, plaintext_len) bytes of the record
plaintext buffer and taking into consideration the last `padlen` of
these for the padding check. With this change, the memory access
pattern and runtime of the padding check is entirely determined by
the size of the encrypted record, in particular not giving away
any information on the validity of the padding.

The following depicts the different behaviors:

1) Previous CBC padding check

1.a) Claimed padding length <= plaintext length

  +----------------------------------------+----+
  |   Record plaintext buffer   |          | PL |
  +----------------------------------------+----+
                                 \__ PL __/

                                +------------------------------------...
                                |  read for padding check            ...
                                +------------------------------------...
                                                |
                                                 contents discarded
                                                 from here

1.b) Claimed padding length > plaintext length

  +----------------------------------------+----+
  |   Record plaintext buffer              | PL |
  +----------------------------------------+----+
                                           +-------------------------...
                                           |  read for padding check ...
                                           +-------------------------...
                                                |
                                                 contents discarded
                                                 from here

2) New CBC padding check

  +----------------------------------------+----+
  |   Record plaintext buffer   |          | PL |
  +----------------------------------------+----+
                                 \__ PL __/

        +---------------------------------------+
        |        read for padding check         |
        +---------------------------------------+
                                |
                                 contents discarded
                                 until here
2019-04-25 12:58:21 +01:00
Hanno Becker
9eddaebda5 Provide standalone version of ssl_encrypt_buf
The previous version of the record encryption function
`ssl_encrypt_buf` takes the entire SSL context as an argument,
while intuitively, it should only depend on the current security
parameters and the record buffer.

Analyzing the exact dependencies, it turned out that in addition
to the currently active `ssl_transform` instance and the record
information, the encryption function needs access to
- the negotiated protocol version, and
- the status of the encrypt-then-MAC extension.

This commit moves these two fields into `ssl_transform` and
changes the signature of `ssl_encrypt_buf` to only use an instance
of `ssl_transform` and an instance of the new `ssl_record` type.
The `ssl_context` instance is *solely* kept for the debugging macros
which need an SSL context instance.

The benefit of the change is twofold:
1) It avoids the need of the MPS to deal with instances of
   `ssl_context`. The MPS should only work with records and
   opaque security parameters, which is what the change in
   this commit makes progress towards.
2) It significantly eases testing of the encryption function:
   independent of any SSL context, the encryption function can
   be passed some record buffer to encrypt alongside some arbitrary
   choice of parameters, and e.g. be checked to not overflow the
   provided memory.
2019-04-25 12:58:21 +01:00
Hanno Becker
d362dc504d Improve documentation of mbedtls_ssl_transform 2019-04-25 12:58:21 +01:00
Hanno Becker
12a3a86b2d Add structure representing TLS records
This commit adds a structure `mbedtls_record` whose instances
represent (D)TLS records. This structure will be used in the
subsequent adaptions of the record encryption and decryption
routines `ssl_decrypt_buf` and `ssl_encrypt_buf`, which currently
take the entire SSL context as input, but should only use the
record to be acted on as well as the record transformation to use.
2019-04-25 12:58:21 +01:00
Hanno Becker
34f88afdf1 Fix definition of SSL_SOME_MODES_USE_MAC
The previous definition was lacking the case of the ARIA and DES ciphers.
2019-04-25 12:58:21 +01:00
Hanno Becker
52344c2972 Correct space needed for MAC in case of NULL cipher
The macro constant `MBEDTLS_SSL_MAC_ADD` defined in `ssl_internal.h`
defines an upper bound for the amount of space needed for the record
authentication tag. Its definition distinguishes between the
presence of an ARC4 or CBC ciphersuite suite, in which case the maximum
size of an enabled SHA digest is used; otherwise, `MBEDTLS_SSL_MAC_ADD`
is set to 16 to accomodate AEAD authentication tags.

This assignment has a flaw in the situation where confidentiality is
not needed and the NULL cipher is in use. In this case, the
authentication tag also uses a SHA digest, but the definition of
`MBEDTLS_SSL_MAC_ADD` doesn't guarantee enough space.

The present commit fixes this by distinguishing between the presence
of *some* ciphersuite using a MAC, including those using a NULL cipher.
For that, the previously internal macro `SSL_SOME_MODES_USE_MAC` from
`ssl_tls.c` is renamed and moved to the public macro
`MBEDTLS_SOME_MODES_USE_MAC` defined in `ssl_internal.h`.
2019-04-25 12:58:21 +01:00
Hanno Becker
e694c3ef3e Remove ciphersuite_info from ssl_transform
Prior to this commit, the security parameter struct `ssl_transform`
contained a `ciphersuite_info` field pointing to the information
structure for the negotiated ciphersuite. However, the only
information extracted from that structure that was used in the core
encryption and decryption functions `ssl_encrypt_buf`/`ssl_decrypt_buf`
was the authentication tag length in case of an AEAD cipher.

The present commit removes the `ciphersuite_info` field from the
`ssl_transform` structure and adds an explicit `taglen` field
for AEAD authentication tag length.

This is in accordance with the principle that the `ssl_transform`
structure should contain the raw parameters needed for the record
encryption and decryption functions to work, but not the higher-level
information that gave rise to them. For example, the `ssl_transform`
structure implicitly contains the encryption/decryption keys within
their cipher contexts, but it doesn't contain the SSL master or
premaster secrets. Likewise, it contains an explicit `maclen`, while
the status of the 'Truncated HMAC' extension -- which  determines the
value of `maclen` when the `ssl_transform` structure is created in
`ssl_derive_keys` -- is not contained in `ssl_transform`.

The `ciphersuite_info` pointer was used in other places outside
the encryption/decryption functions during the handshake, and for
these functions to work, this commit adds a `ciphersuite_info` pointer
field to the handshake-local `ssl_handshake_params` structure.
2019-04-25 12:58:21 +01:00
Hanno Becker
88aaf652b1 Remove key length field from ssl_transform
The `ssl_transform` security parameter structure contains opaque
cipher contexts for use by the record encryption/decryption functions
`ssl_decrypt_buf`/`ssl_encrypt_buf`, while the underlying key material
is configured once in `ssl_derive_keys` and is not explicitly dealt with
anymore afterwards. In particular, the key length is not needed
explicitly by the encryption/decryption functions but is nonetheless
stored in an explicit yet superfluous `keylen` field in `ssl_transform`.
This commit removes this field.
2019-04-25 12:57:19 +01:00
Jaeden Amero
1cd7bea2b1 Merge remote-tracking branch 'origin/pr/2586' into development
* origin/pr/2586:
  all.sh: Require i686-w64-mingw32-gcc version >= 6
2019-04-24 11:23:54 +01:00
Jaeden Amero
9679cb48d5 Merge remote-tracking branch 'origin/pr/2549' into development
* origin/pr/2549:
  Document the scripts behaviour further
  Add --internal option to list-identifiers.sh
2019-04-24 11:22:24 +01:00
Jaeden Amero
5c03c65a66 Merge remote-tracking branch 'origin/pr/2547' into development
* origin/pr/2547:
  generate_visualc_files.pl: add mbedtls source shadowing by crypto
  generate_errors.pl: refactor and simplify the code
  generate_errors.pl: typo fix
  revert changes to generate_features.pl and generate_query_config.pl
  generate_errors.pl: add mbedtls header shadowing by crypto headers
  Add an option to use crypto source files in generated visual c project
  Add description of generate_query_config.pl argument
  Add crypto includes when generating features in generate_features.pl
  Include crypto config when generating query config
  Add crypto includes when generating errors in generate_errors.pl
2019-04-24 11:21:56 +01:00
Jaeden Amero
1439b09049 Merge remote-tracking branch 'origin/pr/2540' into development
* origin/pr/2540:
  Add guards for MBEDTLS_X509_CRL_PARSE_C in sample
2019-04-24 11:20:31 +01:00
Jaeden Amero
2c8d949833 Merge remote-tracking branch 'origin/pr/2480' into development
* origin/pr/2480: (22 commits)
  Use check_output instead of Popen
  Start unused variable with underscore
  Correct documentation
  Check that the report directory is a directory
  Use namespaces instead of full classes
  Fix pylint issues
  Don't put abi dumps in subfolders
  Add verbose switch to silence all output except the final report
  Fetch the remote crypto branch, rather than cloning it
  Prefix internal functions with underscore
  Add RepoVersion class to make handling of many arguments easier
  Reduce indentation levels
  Improve documentation
  Use optional arguments for setting repositories
  Only build the library
  Add ability to compare submodules from different repositories
  Add handling for cases when not all .so files are present
  Extend functionality to allow setting crypto submodule version
  Simplify logic for checking if report folder can be removed
  Add option for a brief report of problems only
  ...
2019-04-24 11:18:57 +01:00
Jaeden Amero
3956a847e6 Merge remote-tracking branch 'origin/pr/2092' into development
* origin/pr/2092:
  Add more missing parentheses around macro parameters
  Add further missing brackets around macro parameters
  Adapt ChangeLog
  Improve macro hygiene
2019-04-24 11:17:21 +01:00